package utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class SpringUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext = null;

    @Override

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException{

        if (SpringUtil.applicationContext == null) {

            SpringUtil.applicationContext = applicationContext;

        }
    }

    // 获取applicationContext

    public static ApplicationContext getApplicationContext(){

        return applicationContext;

    }

    // 通过name获取 Bean.

    public static Object getBean(String name){

        return getApplicationContext ().getBean (name);

    }

    // 通过class获取Bean.

    public static <T> T getBean(Class<T> clazz){

        return getApplicationContext ().getBean (clazz);

    }

    // 通过name,以及Clazz返回指定的Bean

    public static <T> T getBean(String name,Class<T> clazz){

        return getApplicationContext ().getBean (name, clazz);

    }

}
